John Hennessy III,
P.E.
Now that the tunneling machine Bertha’s work is complete, it’s possible to fly a drone with a video camera from end-to-end inside Seattle’s SR 99 tunnel. In two minutes, you’ll see two miles of ongoing construction work. The upper roadway of the tunnel’s double-deck highway is more than 85% complete. Up next? Installation of the lower roadway, and all the systems it takes to operate a modern tunnel.
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The Tallulah Falls Railway crossed Tallulah Falls Lake on a 585-foot bridge built in 1913 as the lake was filling. The deck-style plate girder bridge replaced an earlier wooden truss structure. When the railroad was abandoned in the early 1960s, the steel spans were removed and recycled. The concrete piers were left standing because they had no salvage value and demolition would have been costly.
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Clearing the debris slide blocking SR 503, 20 miles east of Woodland isn’t as easy as just removing trees and rocks from the highway. A large crack shows where the rock face of the slope has separated from the hillside, making it unsafe below. Record rainfall along with freezing temperatures aided in the debris fall. As of Friday, March 17, the slope is still moving and unstable. We shot this video using a drone, so we can start developing a permanent repair plan.
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The East End Crossing is part of the $2.3 billion Louisville-Southern Indiana Ohio River Bridges Project which also includes the new Lincoln Bridge in downtown Louisville and Jeffersonville plus the reconfigured Kennedy Interchange.
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The Colorado DOT took to the skies to show off the magnificent infrastructure of the diverging diamond interchange at the intersection of US 36 and McCaslin Boulevard.
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More than 150 projects are scheduled this season statewide to improve mobility now and in the future. These projects are designed to enhance safety for drivers and pedestrians, improve the flow of traffic and keep Utah’s roads in good condition.
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Earlier this summer, the Oregon Department of Transportation participated in an aerial inspection of the solar panels at the Baldock Solar Station Array. The inspection was performed by Aerial Inspection Resources, who flew a drone equipped with a high resolution infrared camera that can detect malfunctioning solar cells by the extra heat they emit. PGE owns the nearly 7,000 panel array that is located at the French Prairie Rest Area, south of Wilsonville, and was interested in seeing how they could save time and manpower by inspecting the panels with this type of system.
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A short video of wind turbines taken Saturday, December 27, 2014 atop Locust Mountain off Route 924, just east of Shenandoah Heights, in Schuykill County, PA.
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